Product Description

Underwood Ammo’s bonded rounds are unrivaled in power and precision. We utilize Speer bonded bullets which employ an exclusive Uni-Cor process where they bond the jacket to the core one molecule at a time. This essentially eliminates core-jacket separation, maximizes weight retention, and allows for unparalleled penetration and controlled yet fatal expansion.

As with all of Underwood Ammo’s rounds, we utilize flash suppressed powder so that your vision will not be compromised if it becomes necessary to use your firearm in low light.

While taking advantage of our state of the art testing equipment, this high performance ammunition is field tested using popular, real firearms that our customers are most likely to own out in the real world with all the elements you would experience. If for some reason Underwood Ammunition fails to meet performance expectations, we stand by our product 100% and will make sure the customer is satisfied with every purchase.

This ammunition is new production, non-corrosive, in boxer primed, reloadable brass cases.

Nickel plated casings with our new nickel plating process provides several key benefits, not limited to but including; improved feeding in all actions of firearms, enhanced corrosion resistance over traditional brass, improved cosmetics, and ease of cleanup during reloading. Nickel plated casings will not tarnish like brass during storage or when in contact with foreign materials such as leather, moisture, and other metals.

Until the development of the Ducta-Bright 7a process, nickel plating casings often limited the number of reloads as compared to raw brass. It was claimed that nickel plated brass casings “embrittled” the brass therefor making it less desirable for reloaders despite the ease of cleanup that nickel plating offers. In addition, ammunition engineers raising concerns of using nickel plating in “very hot” +P or magnum loads found that traditional nickel plating often cracked deep-drawn cases, or worse, lead to a total failure. This new process eliminates any concern, to the shooter or reloader, of hazard or ability to re-use the brass.

Hot stuff

Posted by Jason Holley on 4th Dec 2016

This is great defense ammo it makes plenty of power to get the job done.

Glock 19

Posted by Aaron on 11th Nov 2016

Ran this though a Glock 19, fed great and didn't show any signs of over pressure. Through the chronograph it averaged 1300 fps! For reference, Remington and Federal 125 gr 357 average between 1285 and 1290 fps out of my Ruger SP101. Pretty impressive performance.

I trust my life with it

Posted by Dave on 2nd Oct 2016

I purchased and shot a whole 20 round box into various targets of different densities and was able to recover some of the projectiles. They retained their weight within 10 grains and jacket did not separate through glass or metal barrier before traveling deep into a 15" gluelam.
I have subsequently purchased 3 more boxes of the same and carry it exclusively in my Glock 19 with Zev barrel.

Wake up call for my EDC G19

Posted by Unknown on 27th Aug 2016

Ok so I've shot Underwood 155 10mm 40 super 40s&w and now 9mm next 460 Rowland . All are very accuright and are moving like they're late to something . Wake up every gun in your safe... This stuff is what you have been looking for.
Thanks for all your great products

Best 9mm as I use it

Posted by Glenn on 21st Aug 2016

I carry this as round 1,3,4,6,7,9,10,12,13 and 14. The other numbers are Underwood 115 Penetrators. Perfect team up IMHO and I will carry both whenever I carry 9mm. I also team up Underwood ammo in my .357 Sig the same way. Just cannot beat it.

perfect combination

Posted by Forrest on 14th Aug 2016

This round is the perfect combo of horsepower and expansion we tested about 22 different hollow points for the 9's and this one is currently riding I'm my G17 with the underwood 115gr +p+ alternating we were so impressed with the expansion on this round it's definitely number one for me.

Feeds great in Lone Wolf AR

Posted by Ben on 13th Aug 2016

Great ammo for my house gun, a Lone Wolf AR-15. I don't have a chronograph and I wonder what these are doing out of a 16.5" barrel... Great ammo, great price. I only use Underwood for defense and hunting. Simply the best, and affordable.

More consistent

Posted by Phil on 9th Aug 2016

Please let me distinguish between old (brass case) and new (nickel case) U-W 124+P+ rounds. Test rounds were fired from G17 & G26. The brass case rounds were significantly faster with a mean velocity of 1370 and a SD of 31 (G17). The new rounds mean velocity (first test) was 1292 with a SD of 11 (G17). Second test was mean of 1306 and SD of 10 (G17). Also, in the G26, new rounds mean velocity was 1222 with SD of 10.
My conclusion is the new (nickel) rounds have been toned down a bit and are more consistent (a good thing). In fact, the older (hotter) rounds would not function (FTE) in my G26 without a heavier recoil spring (to slow down the slide).
The new U-W 9mm +P+ rounds in a G17 are nearly equal to a Federal 357 Sig HST in a G33 (mean velocity of 1299) and a heck of a lot easier to shoot well. The new rounds function flawlessly in both G17 and G26 (stock spring). I will buy again!

great ammo

Posted by Unknown on 8th Aug 2016

I tested this over a Prochrono Digital and it averaged 1287 from a Glock 17 and 1255 from a Glock 19. I shot about 40 rounds with no problems.

This is the good stuff!

Posted by Paul M. on 17th Jun 2016

This is my new carry round. It achieves nearly 1250 fps from my 4" Glock 19, which is over 100 fps faster than the Federal HST 124gr +P that I had been using. The SD for 10 rounds was a remarkably consistent 12 fps.